Method of cleaning films.



M. S. ROSENFELD. METHOD OF CLEAN1NG7 FILMS. APPLICATION FILED SEPT. a.1916.

1 ,273,928. Patented July 30,1918,

3 SHEETS-SHEET I.

Attorney.

M. S. ROSENFELD. METHOD or CLEANING mms. APPLICATION FILED SEPT. 6.l9l6.

1 ,273,928. v Patented July 30, 1918.

3 SHEETS-SHEET 2.

Inventor Attorneys.

M. S. ROSENFELIJ.

METHOD or CLEANING FILMS. APPLICATION FILED SEPT. 6. 1916.

1 273,928. Patented July 30, 1918.

' 3 SHEETS-SljEET 3.

Attomcyl.

the line 66 of Fig. 5;

MAURICE S. BOSENFELD, OF NEW YORK, N. Y.

METHOD or CLEANING FILMS:

Specification of Letters ratent.

Patented July 30, 1918.

Application filed September 6, 1916. Serial No. 118,770.

To all whom it may concern:

Be it known that I, MAURICE S. RosanrnLo, a citizen of the UnitedStates, residing in the borough of the Bronx. county of Bronx; city andState of New York, have invented a new and useful Improvement in Methodsof Cleaning Films, of which the .following is a specification.

The object of my invention is to provide means whereby a film will bethoroughly cleaned and dried before it is reeled.

This and further objects will more fully appear in the followingspecification and accompanying drawings considered together orseparately.

I have illustrated my invention in the accompanying drawings, in whichlike parts are designated by similar reference characters in all ofthefigures, and in which,

Figure 1 is a. diagrammatic side elevation of my invention;

Fig. 2 is an enlarged sectional elevation of the moistener, shown at ein Fig.' 1, the section being taken on the line 2-2 of Fig. 3;

Fig. 3 is a section on the line 3-3 of Fig. 2; 7

Fig. 1 is a top plan view of the moistener;

Fig. 4 is a bottom plan view in detail of a modification;

Fig. 4 is an elevation of the same;

Fig. 5 is a top plan view of the buffer;

Fig. 6 is a section of the sametaken 'on Fig. 7 is a rear elevation ofthe same; Fig. 8 is a top plan view of the feeder; Fig. 9 is alongitudinal section of the same, taken on the line 99 of Fig. 8; andFig. 10 is an end elevation of the same. In the drawing, a indicates asupport on which is mounted a reel 1) carrying the film c to be cleaned.From the reel 1) the film is led to a coating device (Z and thence tothe moistener 6. From the moistener the film is carried to a buffer 7where the coating and moisture are removed. Adjoining the buffer is afeeder g through above mentioned devices, and drives a take-up reel h towhich the end of the film is secured.

The reel 1) is the usual spool on which the film is wound after passingthrough the projecting machine.

The coating device (1 comprises a frame .1; in which is mounted a pairof rolls 2. The

through which the film is led. The feeder draws the film faces of therolls are of less'length than upward into and above thefdistance betweenthe lines of sprocket openings in the film. These rolls are preferablycomposed of cork or some other suitable material, and before the film ispassed through them, eachis given a thin coat of wax or other similarmaterial. The wax coating may be applied by rotating the rollers incontact with a lump of "wax. or they may-be painted with melted waxwhich is allowed to harden.

The rolls 2 are rotated by the passage of the film between them. and asit passes partlcles of wax from the rolls will be deposited upon bothsides of it. The wax will'adhere to the foreign matter on the film.

From the coating device (I the film is drawn through the moistener e.The moistener comprises a base 3 upon which is mounted a standard 4.Carried on the. standard is a tank 5 for containing a liquid, preferablytetrachlorid of carbon. with which the film is to be moistened. The tankis secured in place by a set screw 6. =To

the tank and communicating with the pad holder is a stand pipe 10 whichis open at the top and extends above the surface of the liquid. A pieceof wicking or other porous material 11 rests on the top of the standpipe with one end depending downward in the pipe, and the other endimmersed in the liquid. The liquid will be raisedby the capillaryattraction'of the wick, and will be deposited drop-by-drop in the standpipe and on the pad 8.

Slidably carried on'the standard 4. is a pad carrier 12, within which issupported a pad 13 of material similar to that of the pad 8. The padcarrier is provided with a stand pipe 14 which is in communication withthe bottom of the pad 13, and extends the surface of the liquid in thetank 5. The stand pipe 14 carries a strip of wicking 15 similar to thatcarried by the standpipe 10, by means of which liquid is, by capillaryattraction, deposited in the pad carrier. and by'capillary attractioncarried to the top of the pad 13 which is similar in diameter tothe pad8.

A spring 16 normallyholds' the pad 13 in engagement with the pad 8. Amanually operated. lever 17 is provided for lowering the pad carrier 12against the tension of the spring so as to separate the pads 8 and 13when it is desired to insert the film between them. Suitable guiderollers are carried on the frame and support the film during its passagethrough the moistener.

If desired, a hood 7, Figs. 4 andl'", of plush or other suitablematerial may be placed over the ends of the pads 8 and 13 and be securedin place by spring clips 8.

From the moistener the filmis led to the buffer f. The latter is spaceda considerable distance from the former so as to allow the film to dryduring its travel from one to the other.

The buffer comprises a frame 18 similar in every respect to the frame ofthe coating device, and consists of two side members l9, l9, and a base20 which is secured to the support a. Mounted in the sides is a shaft 21which carries a buff wheel 22 built up of disks of suitable material,clamped together. A shaft 21 carries a rag Wheel 23 which is composed ofstrips of chamois or other suitable material, which is clamped to theshaft with the ends forming the periphery of the wheel loose and.unat-'. tached. The loose ends of the strips of the wheel 23 engage theemulsified side of the film, and will reach into the minute cavities ofsuch surface.

Mounted on one of the side frames 19, and over the rag wheel is achamber 24, open at top and bottom. A block of suitable absorbent,polishing material, such as chalk or magnesia, is carried. in thechamber 24, and rests upon the face of the rag wheel, so that as thelatter is rotated the strips of which it is composed, will wipe off andcarry particles of the polishing material with them. The Wheels 22 and23 are geared together, and the shaft 22 carries a pulley by means ofwhich the buff wheels are driven. A pair of guide rollers 25, 25 aremounted in the frame and direct the film to the feeding device 9.

The feeder comprises a standard 26 carried on the support a, and onwhich is mounted a box 27. Within the box is mounted a roller 28 carriedon a shaft 29 which carries a pulley 30. Projecting from the front sideof the box is a lip 31 which carries a wiping surface 32. The wipingsurface comprises a strip of felt or other suitable material secured tothe lip in any desired manner.

Hinged to the top of the box'27 is a cover 33 which carries two rollers34, 34, which, when the cover is in'place, lie one on each side'of theroller 28, and hold the film in engagement with said roller. The shaft29 of the roller 28 is geared to the shaft of one or both of the rollers34. The cover carries at its front end a lip 35 covered by a wiper 36,similar to those on the'box.

34 down on the film and holding it in close contact with the driveroller. The wiper 36 engages the top of the film, .and as it is drawninto the box both the top and bottom surfaces will be cleared of anyforeign substances. holding the cover in place on the box;

The shaft 29 carries a pulley 39 which is geared to a pulley 40 ontheshaft 21 of the buffer, and the bufierwheels 22 and 23 are gearedtogether in any suitable manner.

From the feeder the film is wound upon the takeup reel h in the usualmanner.

The operation of my improved method and apparatus is as follows:

The film passes through the device with its emulsified side uppermost.

The surfaces of the rolls 2, 2 are coated with wax and as the filmpasses between them the wax-will be caused to scale off and the minutescales will adhere to both sides of the film, and as the rolls are notas wide as the distance between the rows- 23, the coating will be nearlydry and thewheels which are traveling at a high rate of speed, willremove the wax and foreign substances to which it adheres from the film.The lower surface of the film being non-porous and waterproof, will beefl'ectively cleaned and dried by the ordinary bufi' Wheel 22. Theemulsified surface of the film being pitted cannot be cleaned and driedby anordinary wheel, but the loose ends of the chamois strips of thewheel 23 will searchout. the cavities in the surface and dust them withthe absorbent material carried on the strips. The flic f action' of thestrips will brush the chalk m the cavities and from the film. Any chalkwhich may remain on the film will be wiped off by the wipers 32 and 36.

I The rotation of the feed rollers 29 and 34 will draw the film throughthe various de- There is a latch 38 for vices, and will drive the realIt to take up In accordance with tbeprovilions of the no invention canbe carried out in other ways without departing from the spirit of mychalk. v v

9; A method of cleaning photographic --inventin.' Having now demnbed mymventlon,

: what I claim as new and desire to secure films, apl' waxto esurface pfthe-film, dissoi vin g fiie wax, and

byLetters Patent .as follows: 7

1. A method of cleaning 7 photographic which consists of the UnitedStates, is

,then-removingthewax.

surface of the film, mo

2. A' method of cleaning photographic films, which. co m applying thesurface of the 'moisteningthe waxed surface, and thenremovmg the wax andmoisture.

3. A method of cleaning photographic .films, which consistsina p1surface of the e wax, and then removing'thewax, in v je-presence anabsorbent substance.

films, which consis sin a p wax to'the ,surface of the film, dissovinfilt wax, and 'then remo the wax, in e presenceof a finely absorbentmaterial; i,

5. A method" and then of chalk h 6. A method of cl p otographic films,which consists. in applying wax to the the waxed surface, and thenremovinge wax and moisture, in the presence of an absorbent substance;

in; p ymg wax to ace of the. the waxed wax to moving the "wax, waxto ephotographic ofgicleaningphotographic I films, in applying -wax to thesurface of the film, the wax, removing the wax, in the presence methodpogr ph v fifllmfs, which surface,

moisture, inthe presence of chalk.-

8. A method of films, which'consists in applying-wax to the surface ofthe film, moistening the waxed surface, and then remo thewax. and

moisture, in the presence 0 divided films, which in wax to the surfaceof the film, moving the wax and polishing the surface of the film, andthen removing the polishing 10. A method films, whichconsists ina plyingwaxto the ace moving the wax, and the surface of the film withanabsorbent material. 7

11. A method of films, which consists surface of the wax, re-

of the film with a finely divided material.

12. A method of cleaning photographic which consists el y dimo ving thewax, re-

and removing the wax v cleaning photographic do of cleaning photographicofthe film, dissoving'the'wax, re-

I es

cleaning photographic, inapplying'wax to the and pohshing the'surface.

inc, plying wax to the surface of'the film, ving thewax, re-

mo the wax,'an'd the of the fill'n' with a fine'y divi ed. absorbentmaterial. 13.'A method of cleaning photographic films, which consists ina ipl wax to the surface-of thefilm, e wax, rea moving the wax,'. andpohshing the surface of thefilm with'chalk,

14. A-method of j material to the surface dissolv ing the same, and thenremoving'sald plastic material. thi e ti f A 1916 a "o ROSENFI'HJ).

M, Nascmn,

H. Joins.

. cleaning hotographicfilms, which consi 'inaptgying a plastic of e filmas ification signed e witnessed

